1: Stomach cancer
Studies how that people who have blood types A and AB are at a higher risk of developing stomach cancer as compared to blood types B and O.
According to researchers, people with blood types A and AB have an increased immune response to the bacteria known as H. Pylori. It is because of this reaction that people with blood type AB have a 26% higher chance to develop stomach cancer whereas people with blood type A have a 20% higher chance of doing so.
2: Heart attack
Not many people are aware of the fact that one of the easiest ways to predict your chances of suffering a heart attack is by looking at your family history. That is right; people who have relatives that have suffered a heart attack have a much higher chance of suffering from a heart attack themselves. Another way to calculate your chances is by looking at your blood type. According to the European Society of Cardiology, people who possess a non-O blood type have a 9% higher risk of suffering from a heart attack
3: Ulcers
Just like the way H. Pylori can increase the chances of stomach cancer in people with A and AB, it can increase the chances of ulcers in those with blood type O. According to the US National Center for Biotechnology Information (NCBI), the immune system of O blood people attacks H. Pylori ferociously. This intense attack leaves them with swelling, inflammation and stomach ulcers.
4: Cognitive decline
People with blood type AB should look away. According to researchers, people with blood type AB have an 82% greater risk of developing memory loss as they grow older.
